Ventilator



. March 22,1927.

M. M. GARLAND VENTILATOR Filed June '7, 1926 Hi l t H W Patented Mar. 22, 1927.

UNITED P ENT orrtce.

Mar enas aman; or cnicneo, t'rininol' s, aiss te'noa Te snntann ven- TI-Mina consent, oF o'HIeAeo; tumors, A CORPORATION or learners:

VENT LATQR.

Apblioatidn filed June 7,

invention relates to ventilators, and

similar appliances, and pertaiins more parflhe currentsof air flowing: theven tilator are used to advantage by rea'son of the peculiarities of its construction to abstract or withdraw the foul} or contaminated air withjiaeility andefi'ectiveness, this action being aided by employing side openings, heretofore used only as drains,- to perform also an air-withdrawal function thereby ma- 'trial-l-y increasing the power and action of the ventilatorasa whole, v g V 7 To, enable those skilledjn this art to have a full andeemplete understanding ofthis invention, botlr from structural and functional standpoints, in the accompanying drawing, forming a part of this specifieation, a present desirable and preferred embodiment has been illustrated and described-,the same parts being supplied with vlike reference characters throughout the several views of such drawing-.- I

In thisdrawi-ng: Figure 1 a central longitudinal vertical section through the improved ventilator on line 11ot Figure 2; V V Figure 2 is 'aplan View of the ventilator partly broken away to. more clearly indicate some of its internal construction; and

Figure 8 is a cross section through the ventilator on line 3+3 of Figure 2.

By reieren'ce to this drawing, it will be perceived that the novel and improved structure," which is desirably made of sheet-metal roperl coated against corrosion by the elementsi, includes a base-plate 11 having a central round hole 12 therethroug'h of substantial size around the margin or border of which the metal of the basekplate has been turned up to provide a round or circular flange 13', theventilator being intended to be mounted fiatwise on top of the root 14 of a vehicle such as a railway or street car, bus,

automobile, or the like, with the hole 1 2 1926. Serial 1%, 114,096.

in register with a ventilating aperture 15' through the roofl, I

Alon-g its two side edges, this base or hottom-plate 11 has parallel upstanding sidewalls 16, 1 6 co-extensive in length with such bOiI-tOIIiaPlfltQ. v

In actual practice,'it is convenient to form such side-walls by merely bendin'g'uppa'rt's 22, 2 2 between the side-walls 16' 1 6 the lower edges of such flanges being finished by folding the metal back upon itself, as" is coin mon sheet-metal practice. 7 f

Upright cross-walls 28', es'e tending from the base-plate to the cover-plate are fastened in position to the former by foot flanges 2'4,

2 1, these walls being located just outside of opposite portions of the circular flange 13, and, may, desired, be curved slightly at their central: sections to conform to the shape o1 such flange. I r

As is clearly depicted in Figures 2 and ,3,

' these transverse walls do not eitend across thefullfwidth of the appliance, but leave substantial spaces or gaps" between their ends and the side-walls, I

Ateachend oi-the structure an air-deflecting end-wall 2 5 is provided and secured in position in any convenient manner, and, in the present instance, these. walls are cated' as somewhat concave in cross-section,

althoughtheirshape and'degree of or lack of inclination are matters which can be varied con'siderably. I V

In the instant case, the lower edges of such sheet-metal end-walls are folded or ybent around the ends of the bottom-plate and they also have ears or lugs 26 fastened to the inner faces of the side-walls. V

V The top margins of such end-walls, finished smooth by folding back the metal, are

' located above the lower edges of the top or cover flanges 22, 22, but are positioned below the upper face of such top-plate, all as is clearly shown in Figure 1, a substantial gap being present between each such end-wall and its companion or correlated top-plate inclined flange.

Each side-wall, just above the bottomplate, is supplied with a plurality of drain holes 27, 27, each such wall having four in the present instance, and those two of each such four opposite the space between the cross-walls 23, 28 are provided at their opposite ends with outstanding, aid-deflecting wings or lugs 28, 28, the presence of which in no way lessens the capacity of such apertures for acting as drain holes but they materially increase the amount of foul air withdrawn from the vehicle by reason of the withdrawal suction action of the air striking and being deflected by such wings on the air inside of the ventilator.

When the vehicle, equipped with such improved ventilator, is traveling forward, the air striking the front end-wall 25 is swerved or deflected upwardly and upon reaching the top edge of such end-wall, it flows over it and over the top of the upper wall 21, in so doing forming a substantial suction-action at the space between the parts 25 and 22 which withdraws the foul air from the Veliicle through the roof aperture 15, hole 12, the space between the cross-walls, the gaps between the ends of the cross-walls and the side-walls and the space beneath the overhanging portion of the top-wall. I

Such withdrawal operation is aided by the upward inclination of the flange 22 which assures that the air currents will easily pass over the top of the roof-plate 21.

Also, the air flowing rearwardly over the top-plate 21 causes a similar suction action as it passes over the rear cross-opening between the parts 22 and 25, thus effecting a material removal of foul air at that end of the appliance.

This whole air abstraction action, l1OW- ever, is increased in positive degree by the suction-action which occurs at those of the side-openings 27 fitted with the deflectors 28 which augment the withdrawal action through such openings.

As will be readily understood, any rain which may have access to the interior of the structure cannot find its way into the ve hicle, being blocked by the guarding flange 1.8 around the opening 12 and it has quick egress or discharge through the drain openings in the vside-walls.

Those skilled in this art will readily understand that this invention is not limited and restricted to the precise and exact details shown and described and that many minor mechanical changes may be incorporated in the appliance without departure from the heart and essence of the invention as defined by the appended claims and without the sacrifice of any of its substantial and material benefits and advantages.

1 claim:

1. In a ventilator, the combination of a base having an opening to coincide with a similar aperture through the roof of the structure to be ventilated and an upstanding flange around the margin of said opening, side-walls rising from said base, a top-wall of less length than and connecting said sidewalls with a space between the under side of said top-wall and the top edge of said flange, intermediate transverse walls to the front and rear of said base opening extending from said base to said top-wall but terminating short of said side-walls and located inwardly away from the front and rear margins of said top-wall, and end-walls upstanding from the front and rear ends of said base with spaces between them and said top-wall, said side-walls just above said base having drain holes therethrough with outstanding lips at their ends to direct the outside currents of air to increase the suction at said drain holes.

2. In a ventilator, the combination of a base having an opening adapted to coincide with a similar aperture through the roof of the structure to be Ventilated and an upstanding flange around the margin of said opening, side-walls rising from said base, a top-wall of less length than and connecting said side-walls with a space between the under side of said top-wall and the top edge of said flange, intermediate transverse walls to the front and rear of said base opening extending from said base to said top-wall but terminating short of said side-walls and located inwardly away from the front and rear margins of said top-wall, said front and rear margins having turned-down flanges between said side-walls and end-walls upstanding from the front and rear ends of saidbase with spaces between them and said top-wall, said side-walls just above said base having drain holes therethrough with outstanding lips at their ends to direct the outside currents of air to increase the suction at said drain holes.

3. In a ventilator, the combination of a base having an opening adapted to coincide with a similar aperture through the roof of the structure to be ventilated and an upstanding flange around the margin of said opening, side-walls rising from said base, a

top-wall of less length than and connecting said side-walls with a space between the under side of said top-wall and the top edge of said flange, intermediate transverse walls to the front and rear of said base opening extending from said base to said top-wall but terminating short of said side-walls and, located inwardly away from the front and rear margins of said top-Wall, said front and said base having drain holes therethrough rear top-Wall margins having doWnWardlywith outstanding lips at their ends to direct it v v sloping flanges between said side-Walls, and the outside currents of air to increase the end-Walls upstanding from the front and rearsuction at said drain holes.

ends of said base with spaces between them In witness whereof I have hereunto set my and said top Wall, the top edges of said endhand.

walls being above the lower margins of said top-Wall flanges, said side-Walls just above MAMIE MATHER' GARLAND. 

